Exercise machine



FIG. 1 is an oblique view of an exercise machine showing my new design;

FIG. 2 is a side elevation view thereof showing the front side;

FIG. 3 is a side elevation view thereof showing the back side;

FIG. 4 is a side elevation view thereof, showing the left side;

FIG. 5 is a side elevation view thereof, showing the right side;

FIG. 6 is a top plan view thereof; and,

FIG. 7 is a bottom view thereof.

The broken lines shown in the figure views form no part of the claimeddesign.

CLAIM The ornamental design for an exercise machine, as shown anddescribed.